Foods
·
2022
·Vol. 11
·期 24
·4073
·
IF 5.561
Yingrui Ji,Dongming Lan,Weifei Wang,Kok Ming Goh,Chin Ping Tan,Yonghua Wang
With the prevalence of edible diacylglycerol (DAG) oil, which is beneficial to human, the generation of 3-monochloropropanediol esters (3-MCPDE) and glycidyl esters (GE) as well as the stability of physical properties during heat-induced processing still need to be explored. In this study, the experiment used olive-based edible oil with different contents of DAG (40, 60, and 80%) to make crackers and fry chicken. They were heated at 160 and 180 °C to determine the changes in 3-MCPDE and GE, the crackers’ hardness and gumminess, and the physical properties of the oil. During baking and frying, 3-MCPDE decreased, while the content of GE slightly increased with the prolonged heating duration. Finally, 3-MCPDE and GE were lower than 1.25 mg/kg and 1.00 mg/kg, respectively. The AV increased proportionally as duration increased and POV was below 0.30 g/100 g. In general, the changes in 3-MCPDE and GE were related to the heating temperature and duration, and not significantly (p> 0.05) related to the content of DAG.Keywords:3-MCPD ester;glycidyl ester;diacylglycerol;crackers;frying oil
研究领域:
食品科学
·
化学
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产品关联
DOI
PubMed
高影响因子
Journal of Cleaner Production
·
2024
·
IF 9.7
Jia-Liang Guo,Qing-Qing Sun,Zhong-Qiu Liu,Feng-Xiang Wang,Tingjun Fu,Yujing Liu,Anguo Ying
Directionally converting waste frying oil (WFO) to biodiesel is not only a crucial strategy for its clean and efficient utilization, but also a promising alternative for the large-scale substitution of petroleum-based fuels. However, the challenge of reducing mass transfer resistance between the alcohol/oil bi-liquid phases remains a major obstacle in the industrialization of WFO-based biodiesel (WFOBB). Additionally, both rapid emulsification and efficient demulsification still present bottlenecks that need to be addressed in emulsion reaction. Herein, the present study successfully demonstrates the fabrication of a novel Pickering interfacial catalyst with immobilized Brønsted-Lewis di-acid functionalized ionic liquids and photosensitizer (P(5[DVB]-[SP]-[ILs-2FeCl 3 ])@SiO 2 @Fe 3 O 4 ) through layer-by-layer self-assembly. This novel Pickering interfacial catalyst efficiently constructed an intelligent magneto-optical dual stimuli-responsive Pickering emulsion . The intelligent Pickering emulsion enables precise control over amphiphilic interfacial catalyst using Vis-light regulation, thereby significantly enhancing mass transfer in the biphasic methanol-WFO system while providing an optimal hydrophobic micro-environment for highly efficient WFOBB production . The intelligent Pickering catalyst exhibits exceptional catalytic performance in achieving a 92.4% yield of WFOBB, which is currently the highest reported value under similar conditions. Furthermore, the efficient demulsification and separation of this Pickering interfacial catalyst could be achieved through the synergistic effect of UV-irradiation-induced hydrophilicity and its magnetic property. These findings present a new avenue for advancing the development of WFOBB technologies, while also offering promising prospects for industrial applications of Pickering emulsion systems .
研究领域:
化学工程
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环境科学
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材料科学
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产品关联
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2025
·
IF 7.2
Rui Han,Shizhi Ruan,Anning Zhou,Zhen Li,Hong Wang,Ningning Zhang
Waste fried oil (WFO) and coal gasification fine slag (CGFS) are both environmentally hazardous wastes, and the flotation separation of resources from CGFS is over-reliant on non-renewable petrochemicals as collectors, it is significant to utilize WFO to prepare renewable collectors for CGFS separation. In this study, six surfactants were selected to be compounded with WFO to prepare renewable collectors, and the flotation effect of the compounded collectors on CGFS and the surfactant-enhanced mechanism for WFO flotation effect were examined through flotation experiments, flotation kinetics experiments, laser particle size analysis, FTIR analysis, XPS analysis, and induction time tests. The results show that WFO alone needs to be used in a large dosage (>30 kg/t) in order to show better flotation performance than diesel, while the flotation performance is greatly improved after compounding with surfactants, among which the best effect is achieved with Span80, and the dosage cut-off point of the compounded collector for flotation better than diesel is reduced to 12.5 kg/t. The surfactant can make the dispersed droplet size of WFO in water decrease from D 50 = 120 μm to 5.63 μm. Meanwhile, the surfactant-assisted WFO can be adsorbed on the residual carbon surface of CGFS through hydrophobic and hydrogen-bonding forces, which can mask the hydrophilic region of the carbon surface and enhance its hydrophobicity. Surfactant-assisted WFO can further shorten the adhesion induction time between CGFS particles and air bubbles, thus facilitating the recovery of more residual carbon in a shorter period of time. The findings can provide theoretical basis and technical support for the resourceful disposal of WFO and CGFS synergistically.
研究领域:
环境科学
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资源回收
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化工
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产品关联
DOI
高影响因子
DIAMOND AND RELATED MATERIALS
·
2023
·
IF 4.1
Yuan Xue,JinXia Wang,Hong Yuan,Hui Li
With the aim of preparing a sulfonic acid-type solid acid catalyst having a high density of acid sites and excellent stability, this work synthesized sulfonic acid bowl-shaped hydrothermal carbon microspheres (SA-OBHCs), using amine groups as the primary sulfonic acid bonding sites. This material was synthesized via a three-step functionalization process comprising the oxidation , amidation and sulfonation of BHCs. The extent to which chlorosulfonic acid reacted with amine groups in diethylenetriamine molecules on microsphere surfaces was also investigated using density functional theory calculations. These calculations showed that the substitution reaction of primary amines proceeded less readily than that of secondary amines but provided a more stable product. The surface acid d ensity of the SA-OBHCs was as high as 11.2 mmol·g −1 and the –SO 3 H groups on the SA-OBHCs were found to be thermally stable up to 200 °C. These SA-OBHCs were subsequently used to catalyze the synthesis of fatty acid methyl esters (FAMEs) from a waste frying oil model compound and methanol. Reactions performed using a methanol/oil molar ratio of 20:1 at 140 °C for 3 h gave a FAMEs yield of 93.4 %. After four reuses, an SA-OBHCs specimen provided a FAMEs yield of 77.5 %, demonstrating the significant stability of this material.
研究领域:
化学工程
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催化材料科学
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产品关联
DOI
高影响因子
JOURNAL OF POROUS MATERIALS
·
2019
·Vol. 26
·期 5
·1435-1445
·
IF 1.947
Yang Lijuan,Yuan Hong,Wang Siyu
Ordered mesoporous carbon (OMC) was prepared via the inverse replication method using SBA-15 as a hard template and sucrose as a carbon precursor. OMC was sulfonated to obtain the solid acid catalysts, such as OMC-SS and OMC-DS, by heating with sulfuric acid or coupling with sulfanilic acid diazonium. TEM and small-angle X-ray diffraction (XRD) results showed that OMC, OMC-SS, and OMC-DS exhibited ordered porous structures. XPS and Raman analysis showed that OMC had graphite structure. N 2 -BET analysis indicated that OMC, OMC-SS, and OMC-DS had average pore diameters of 3.0–3.3 nm and exhibited bimodal mesopore size distributions. Moreover, N 2 -BET analysis revealed that OMC, OMC-SS, and OMC-DS had surface areas of 1411, 924 and 1001 m 2 /g, respectively. The surface acid contents of OMC-SS and OMC-DS were 3.9–4.0 mmol H + / g and higher than those of OCM (2.8 mmol H + /g). FTIR results demonstrated that –SO 3 H was present on OMC-SS and OMC-DS. OMC-SS and OMC-DS were used to catalyze the transesterification and epoxidation of waste frying oil. The transesterification reactions catalyzed using OMC-SS and OMC-DS provided the maximum yields of fatty acid methyl esters of 90.3 ± 3.3% and 89.0 ± 2.1%, respectively. The double-bond conversion rates of epoxidation reactions catalyzed using OMC-SS and OMC-DS reached 77.2 ± 1.9% and 68.5 ± 2.6%, respectively. The epoxy yields of epoxidation reactions catalyzed using OMC-SS and OMC-DS were 70.3 ± 2.4% and 65.1 ± 1.8%, respectively.
研究领域:
材料科学
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催化化学
✓ 已验证
DOI
高影响因子
JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY
·
2019
·Vol. 94
·期 11
·3538-3547
·
IF 2.659
Lijuan Yang,Siyu Wang,Hong Yuan,Hai Liu
BACKGROUND Mesoporous double-layer carbon microspheres (DCSs) were synthesized using hollow tin(IV) oxide (SnO 2 ) microspheres as hard template and sucrose as carbon precursor via the hydrothermal method. Sulfonic acid groups (-SO 3 H) were introduced onto the surfaces of DCS by sulfuric acid heating and sulfanilic acid diazonium coupling, respectively, to form two solid acids (DCS-SS and DCS-DS, respectively). RESULTS The transmission electron microscopy images showed that the carbon microspheres possessed a hollow double-layer structure with diameters of about 200 to 300 nm and shell thickness of about 30 to 50 nm. Furthermore, the sulfonate treatments caused no changes in the morphology of carbon microspheres. The nitrogen (N 2 )-Brunauer–Emmett–Teller (BET) results indicate that DCS, DCS-SS, and DCS-DS featured mesopores with an average pore size of 4.5 to 4.8 nm and BET surface areas of 75 m 2 /g, 57 m 2 /g, and 53 m 2 /g, respectively. The X-ray photoelectron spectroscopy and Fourier-transform infrared results confirmed that the DCS-SS and DCS-DS contained a -SO 3 H group and their surface acid densities are 4.5 and 4.1 mmol/g, respectively. CONCLUSION DCS-SS and DCS-DS were used to catalyze the transesterification of waste frying oil, and the highest yields of fatty acid methyl esters, that is, 85% and 80%, respectively, could be obtained. © 2019 Society of Chemical Industry
研究领域:
材料科学
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催化化学
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产品关联
DOI
高影响因子
BIORESOURCE TECHNOLOGY
·
2022
·
IF 11.889
Jing Liu,Guanyi Chen,Beibei Yan,Weiming Yi,Jingang Yao
Magnetic whole-cell biocatalysts (MWCBs) constructed by immobilizing Bacillus subtilis cells within ferroferric oxide-polyvinyl alcohol composite beads were developed and employed to transesterify waste frying oil to biodiesel in a magnetically fluidized bed reactor (MFBR). Effective variables including biocatalysts concentration, reactant flow rate, magnetic field intensity and temperature were evaluated to enhance the transesterification. By coupling MFBR with MWCBs, continuous biodiesel production was achieved. Response surface methodology and Box-Behnken design were employed to predict the optimal conditions and the maximum biodiesel yield reached 89.0 ± 0.6% after 48 h under the optimized conditions. Furthermore, MWCBs displayed satisfactory stability and reusability in MFBR and still maintained a biodiesel yield of more than 82.5% after 10 cycles. Lastly, the fuel properties of the obtained biodiesel met the ASTM and EN standards. The present study revealed that the route of producing biodiesel over MWCBs in the MFBR system showed great potential for industrialization.
研究领域:
生物工程
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能源科学
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环境工程
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产品关联
DOI
PubMed
高影响因子
BIOCHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 3.7
Junzhang Chang,Jingwen Yang,Ben Xing,Xueqin Hu,Changchun Xu,Hongbin Zhang
Waste frying oil is a highly promising feedstock for biodiesel production due to its lower cost compared to refined vegetable oils. In this study, biodiesel was prepared by transesterification of mixed waste frying oil with dimethyl carbonate, utilizing immobilized recombinant lipase in tert -butanol as the medium. The activation energy ( E a ) and pre-exponential factor (k 0 ) were determined to be 73.8 kJ/mol and 1.62×10 6 , respectively. Under optimal reaction conditions, the biodiesel yield can reach 88.5%. Subsequently, cottonseed oil was introduced into the feedstock to enhance the crystallization temperature of the product, which enables biodiesel production to meet the fuel property standards. The cold filter plugging point of biodiesel was reduced to 4.3 ℃. Ultimately, blending biodiesel with diesel significantly reduces smoke emissions from diesel engines, with the B80 blend demonstrating superior effectiveness. This study presents an efficient and cost-effective method for biodiesel production.
研究领域:
可再生能源
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化学工程
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环境科学
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机械工程
✓ 已验证
DOI
高影响因子
FOOD CONTROL
·
2022
·
IF 6.652
Xinyu Cao,Zhan Ye,Xue Li,Yong-Jiang Xu,Yuanfa Liu
As the major oxidized triglycerides (ox-TGs), epoxy triglyceride is one of the toxic polar components from deep frying oil. However, the conventional methods are difficult to separate epoxy triglyceride from other ox-TGs due to their similar molecular and structures. To address the problem, a novel magnetic solid-phase extraction approach based on a surface molecularly imprinted polymers was developed. The polymers coated on Fe 3 O 4 nanoparticles (Fe 3 O 4 @MIPs) were synthesized and used as highly selective sorbents for capture epoxy triglyceride from deep frying oil. They have high adsorption capacity (58.3 mg/g), stable equilibrium adsorption time (60 min) and excellent specificity. This method had a satisfactory linear relationship in the range of 0.2–10 mg/L ( R 2 = 0.997), and the detection limit of epoxy triglyceride was 0.0599 mg/L. Results indicated that Fe 3 O 4 @MIPs could not only specifically separate epoxy triglycerides, but also provided a potent idea for the separation of other ox-TGs from deep frying oil.
研究领域:
分析化学
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食品科学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
BIOPROCESS AND BIOSYSTEMS ENGINEERING
·
2023
·Vol. 46
·期 8
·1175-1194
·
IF 3.8
Liu Siyuan,Liu Wei,Yin Hao,Yang Chunyan,Chen Jianxin
This work focused on the development of an inexpensive carbon source and the improvement of the fermentation-foam fractionation coupling system. The rhamnolipids production capacity of waste frying oil (WFO) was evaluated. The suitable bacterial cultivation of seed liquid and the addition amount of WFO was 16 h and 2% (v/v), respectively. A combined strategy of cell immobilization and oil emulsion avoid cell entrainment inside foam and improves the oil mass transfer rate. The immobilization conditions of bacterial cells into alginate-chitosan-alginate (ACA) microcapsules were optimized using the response surface method (RSM). Under the optimal conditions, rhamnolipids production using batch fermentation with immobilized strain reached 7.18 ± 0.23% g/L. WFO was emulsified into a fermentation medium using rhamnolipids as emulsifier (0.5 g/L). By monitoring dissolved oxygen, 30 mL/min was selected as a suitable air volumetric flow rate for fermentation-foam fractionation coupling operation. The total production and recovery percentage of rhamnolipids were 11.29 ± 0.36 g/L and 95.62 ± 0.38%, respectively. Graphical abstract
研究领域:
生物技术
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环境工程
·
化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）